I used clips from this in a mashup, then posted the mashup on YouTube. Three months later YouTube's legalbots informed me that the mashup "may have content that is owned or licensed by Cinecittà Luce Spa". Note that there is no Creative Commons License on this "Community Video".

Here is the Wikipedia description:

11'09"1 September 11 is a 2002 international film composed of 11 contributions from different filmmakers, each from a different country. Each gave their own vision of the events in New York City on September 11, 2001, in a short film of 11 minutes, 9 seconds, and one frame. The original concept and production of the film were by French producer Alain Brigand. It has been released internationally with several different titles, depending on the language. It is listed in the Internet Movie Database as 11'09"01 - September 11, while in French, it is known as 11 minutes 9 secondes 1 image and in Persian as 11-e-Septambr....

Ken Loach (segment "United Kingdom")
This segment features Pablo, a Chilean singer-songwriter exiled in London, writing a letter to the American people condemning the terrorist attacks and telling the story of Salvador Allende's government and the tragic consequences of Chile's own 9/11.